Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 23 · 40 questions

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

1. 1.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
3. 3.What does a buzzer do? (a) is a resistance knob (b) beeps for an alarm (c) turns a fan or wheels (d) senses how bright it is
4. 4.True or false: a potentiometer glows using little power. (a) False (b) True
5. 5.True or false: a fuse blows if current is high. (a) False (b) True
6. 6.🧩 Which component limits the current? (a) resistor (b) capacitor (c) diode (d) potentiometer
7. 7.🧩 Which component stores a little charge? (a) thermistor (b) LDR (c) fuse (d) capacitor
8. 8.🧩 Which component glows using little power? (a) LDR (b) capacitor (c) LED (d) diode
9. 9.True or false: a capacitor is a resistance knob. (a) True (b) False
10. 10.True or false: a thermistor blows if current is high. (a) False (b) True
11. 11.What does a transistor do? (a) boosts a small signal (b) beeps for an alarm (c) smooths a wobbly supply (d) lets current go one way
12. 12.What does an LED do? (a) has coloured bands (b) glows using little power (c) boosts a small signal (d) stores a little charge
13. 13.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
14. 14.True or false: an LDR senses how bright it is. (a) False (b) True
15. 15.What does a fuse do? (a) blows if current is high (b) limits the current (c) makes things spin (d) beeps for an alarm
16. 16.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) boosts a small signal (d) makes things spin
17. 17.🧩 Which component senses how hot it is? (a) motor (b) LDR (c) thermistor (d) fuse
18. 18.🧩 Which component turns a fan or wheels? (a) potentiometer (b) diode (c) resistor (d) motor
19. 19.🧩 Which component beeps for an alarm? (a) transistor (b) thermistor (c) LDR (d) buzzer
20. 20.What does an LDR do? (a) senses how bright it is (b) beeps for an alarm (c) limits the current (d) makes a beeping sound
21. 21.What does a resistor do? (a) blows if current is high (b) limits the current (c) stores a little charge (d) turns a fan or wheels
22. 22.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) buzzer (d) LDR
23. 23.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
24. 24.What does a potentiometer do? (a) makes a beeping sound (b) senses how bright it is (c) is a resistance knob (d) beeps for an alarm
25. 25.True or false: a buzzer makes things spin. (a) True (b) False
26. 26.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) is a resistance knob (d) makes a beeping sound
27. 27.True or false: a potentiometer is a resistance knob. (a) False (b) True
28. 28.What does a motor do? (a) is a resistance knob (b) limits the current (c) makes things spin (d) senses how hot it is
29. 29.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) thermistor (d) motor
30. 30.What does a diode do? (a) beeps for an alarm (b) makes a beeping sound (c) lets current go one way (d) smooths a wobbly supply
31. 31.True or false: a resistor senses how bright it is. (a) False (b) True
32. 32.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) beeps for an alarm (d) senses how hot it is
33. 33.🧩 Which component makes things spin? (a) fuse (b) motor (c) capacitor (d) resistor
34. 34.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) potentiometer (d) fuse
35. 35.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) motor (d) potentiometer
36. 36.True or false: a capacitor stores a little charge. (a) False (b) True
37. 37.True or false: a transistor beeps for an alarm. (a) True (b) False
38. 38.True or false: a potentiometer blows if current is high. (a) True (b) False
39. 39.True or false: a resistor senses how hot it is. (a) True (b) False
40. 40.True or false: a buzzer makes a beeping sound. (a) True (b) False

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids